色彩系统转换程式图片上每个像素的rgb -> hsv -> YUV -> YIQ -> YCbCr -> CMYK 转换 -Color system conversion program on each picture pixel rgb-> hsv-> YUV-> YIQ-> YCbCr-> CMYK conversion

cmyk转rgb，这是我自己写的，对于刚接触cmyk的人来讲，很有帮助-turn cmyk rgb, this is my own writing, speaking for people who are new to cmyk helpful